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[css-sizing-4] Add the frame-sizing property#13701

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tabatkins merged 4 commits into
w3c:mainfrom
kojiishi:frame-sizing
Mar 26, 2026
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[css-sizing-4] Add the frame-sizing property#13701
tabatkins merged 4 commits into
w3c:mainfrom
kojiishi:frame-sizing

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[css-sizing-4] Add the frame-sizing property

Based on the resolutions at:
#1771 (comment)

@kojiishi kojiishi requested a review from tabatkins March 23, 2026 10:12
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@tabatkins PTAL.

Since this PR contains a move and edits, I split changes to "a move commit" and "edits commit", in case this helps reviewing.

Comment thread css-sizing-4/Overview.bs Outdated

In addition,
the internal document can call {{window/requestResize()|window.requestResize()}};
if the document still has the required <{meta}> element,
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This seems to go against the philosophy of freezing the meta value, and I guess would require us to track exactly which meta element was the one that set the value. Seems confusing - is there a need to keep this behavior?

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Good catch, thanks. Can you take a look at updated text and see if it's good for readers?

Comment thread css-sizing-4/Overview.bs Outdated
but will be updated to ''500px'' once the iframe's document loads.
</div>

Issue: Should this apply even when ''contain:size'' isn't specified?
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I think this is no longer relevant, now that frame-sizing is what's controlling the behavior.

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Removed, thanks!

@tabatkins tabatkins merged commit 42f5ae0 into w3c:main Mar 26, 2026
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@kojiishi kojiishi deleted the frame-sizing branch March 27, 2026 15:44
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2 participants